Polishing wheel



Feb. 17, 1925.

J. J. MANDERSCHEID POLISHI NG- WHEEL r l 1 f Patented Feb. 17, 1925.

UNITED STATES PATENT OFFICE.

JAMES J'. MANDETRSCHEID, OF NOR-WOOD PARK, ILLINOIS, ASSIGNOR TO' ADVANCE WHEEL MANUFACTURING- COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

POLISI-IING WHEEL.

Application filed December 13, 1922.

` To all who-m t may concern.'

Be it known that I, JAMES J. MANnna soHnID, a citizen of the United States, resid ing at Norwood Park, in the county of Cook and State of Illinois, have inventedA certain new and useful Improvements in Polishing `Wheels, of which the following is a speci fication.

This invention relates, generally, to iinprovenients in polishing wheels, but particularly to that type ot' such wheels which are made up of superposed layers or disks of canvas, sheep-skin, walrus hide, wood and the like, and it consists in certain peculiarities of the construction, novel arrangement and combination of the various parts thereof, as well as, in the novel method of making the same, as will be hereinafter more fully set forth and specifically claimed.

The principal object of the invention is the provision of polishing wheels of the highest efficiency designed, more particularly, for polishing castings of various, and of such structural character, that certain ofthe layers or disks of the wheel can be made up ot' parts, of the desired material, which have heretofore usually7 been discarded as useless, thereby effecting great economy in material and consequently in the manufacture of the wheels.

Another and important object of the invention is to so construct, arrange and unite together, the various parts of the wheel as to render the liability of breakage, or flying apart of portions of the wheel, due to centrifugal action or strain incident to the high speed at which such wheels are rotated, impossible or reduced to a minimum.

A further object, is, to furnish means -for interlocking the adjacent edges of the segments or sectors of. the sectional disks of the wheel, in such a way as to absolutely prevent their accidental detachmentor dislocation one from another, or in other words, to render the sectional disks as strong and durable as if they were each made of a single piece of material.

The invention also contemplates new features or steps in themethod of preparing and assembling parts ot' the wheeh.;

CAS

Serial No. 606,696.

In the accompanying drawing,-

Fig. l is a view in side elevation ot a polishing wheel illustrating the preferred embodiment of the invention.

Fig. 2 is a central sectional view taken e.

on line 2-2 ot' Fig. 1 looking in the direction indicated by the arrows. v

Fig. 3 is a detached perspective view ot one of the segments whichl go to make up or :torni one of the sectional disks of the wheel.

Fig. 4: is a face view of a portion of one of said segments, illustrating a modilication in the form of the recesses used for receiving interlocking tongues or projections on the ledge of the adjacent segment.

Fig. 5 is an enlarged sectional view of a portion of one of the disks or layers of the wheel, taken on line 5 5 of Fig. 4 showing it in about the condition it will appear after having been treated to aliquid solution or giving rigidity to the material out of which the segment is made.

Fig. 6 is an enlarged edge view of one of the segments showing the formation and disposition of the recesses therein 'for the reception of interlocking tongues or projections on the edge of the adjacent segment or section, and

Fig. 7 is a perspective view of portions ot a pair of the segmental sections showing them in the initial positions they will occupy when they are being secured together.

Corresponding numerals ot' reference refer to like parts throughout the different views of the drawing.

As is clearly shown in Fig. ot' the drawing, the wheel comprises a plurality ol sin per-posed layers or disks S and 9, alternately7 arranged, and having a. central opening 10a for the reception of a. shaft on which the wheel is mounted for rotation. These disks may be made of any suitable material, such as tough leather, canvas, sheep skin, Walrus hide, wood, and the like, and of any suitable dimensions. The disks 8 are each formed ot a single piece of material, while each `ot the disks 9 comprises a plurality of segmental sections 10 of uniform thickness. Each of the sections 10 provided in one 'of its edges with one or more recesses 1l, and at its opposite edge with one or more tongues or projections l2 corresponding in shape and size to the shape and size of said recesses. By this arrangement it is apparent that by placing the tongues 1201 one of the sections of the composite disk in the recesses of the adjacent edge of the section or segment adjoining the said sections will be4 interlecked so as to prevent outward radial displacement no mattei' what the form ot the recesses and projections may be.

However, in order to not only lock the sections together against outward radial displacement, but also against lateral movement in either direction, l prefer to provide each ot thesegments l inone of its straight edges, with a plurality oitl recesseslpl, 'which recesses have their walls beveled in vopposite directions alternately, as is clearly shown in Fig. 6 of the drawings. The other edge of thesection is pro-vided with a plurality of tongues or projections l2,whieh have their wallsbeveled'in opposite directions alternately and made of a size to fit snugly in the recesses ofthe adjacent segment. By this arrangement it is .-nman'ijtest that the segments will be interlocked against lateral movement as well as outward radial movement. l

As the segments 10, as well as theV one piece disks 8 are by preference made of leather or material' possessing some flexibility and of Lan absorbent character, it is desirable that the edge portions of the segments lOin which the recesses Hare formed and on which the interlocking tongues or projections therefor areprovided, shall be substantially stiftl or rigid, in order to permanently maintain the segments in their interlocked positions, a coating 13 oi' any suitable material or solutionl which will quickly permeate the material of the, segments, readily dry the'reonand give rigidity and stability thereto is applied to said edges, recessesand tongues. Y

The application of the coating l?) to the edges of each ofthe segments 10 is preferably made before the said segments or sections are united, but it is obvious that the segments may first be unitedandv then the coating `applied thereto without a departure from the spiriteof the invention. The material or solution providingthc coating 13 mayor maynot have adhesive qualities.V

In unitingthe'segments orsections l()v to form complete disk, the members of a pa of the segments are placed with their straight edges, one of said edges having the projections l2 or tongues.r and the other the recesses l1, diagonally with respect to each other and in contact.. with one another as shown in Fig. i of the drawing. lVhen in this` position oneof the tongues or projections 12 will be' located on one" sidel of the segments l0 having the recesses 1l therein, while the other projection or tongue l2 will be on the opposite side of the recessed segment. Now, by aligning the faces of the segment 10, it is manifest that the projectionsior tongues l2 will "enter the recesses trom opposite sides, thus firmly securing the segments together. After the sectional disks have thus been formed, said sectional disks and the one piece disks 8 are coated with glue which will penetrate the material out of which' the disks are made, and the disks are then placed one on the other' so that the one piece disks Sand the sectional disks 9 will be alternately arranged and so that the openings of said disk will register with one another as is clearly shown in of the drawings, in which view it will be understood that a single piece disk-8 is located outwardly on each face of the wheel. The assembled disks are now placed -in aY press and subjected to pressure for a sufficient time to permitthe glue to become dry when the Iwheel is ready for use.

In F ig. 4 of the drawing is shown a modifica-tion in the construction of the recesses in one ofthe edges ofeach of the segments composing the sectional disks. In this modified form the. recesses ll are circular in shape instead'of being of dove tail shape, as shown in `other views of the drawing. When this modified form of the recesses is employed, it is manifest thatv the projections for engagement therewith and located on the adjacent segment, are of a corresponding shape-to said recesses. The modified form of recesses Amay have their walls tapered in opposite `directions as shown in (i and above described.

l--Iavingthus fully described my invention, what I claim as new and desire to secure by Letters Patentis-d l.. it segmental section Yfor polishing wheels having its periphery curved in the arc of ajcircle,.its sides flat, and one oi its edgesY provided with recesses to receive and engage correspondingly shaped projections on the edge of an adjacent section, the other edge being provided with interlocking projections for engagement with recesses in the edge of a section adjacent thereto, the edges ot the sectionsl including the recesses therein andUt-he projections thereon having applied thereto absorbent material for giving rigidity or stiilnesslto said. parts.

herein described method of construct'ing a polishingV wheel composed of :1 plurality of superposed disks, consisting in makingone of `said disks of separated segmental sections, each oiV said sections having one of its straight edges provided with a plurality ,of oppositely flared recesses and the other straight edge of each section being provided with interlocking projections enla'rgedy in oppositiedirections,

coating the straight edges including their recesses and projections with material for giving stillness and rigidity to said parts, then placing the projection carrying edge of one ot' the sections diagonally with respect to the recess carrying edge of another section and against the saine and then placing said sections in alignment and at the same time fitting the projections on one section into the recesses of the other section.

3. A section for polishing Wheels having one of its edges curved in thearc of a circle, its sides flat, and one of its edges provided With recesses therein to receive and engage correspondingly shaped projections on the edge of an adjacent section, the edge of the section including the recesses therein having applied thereto absorbent niaterial for giving rigidity or stiffness to said parts.

4. A section for polishing Wheels having one of its edges curved in the arc of a circle, its sides flat, and one of its edges provided with interlocking projections adapted to engage correspondingly shaped recesses on the edge of an adjacent section, the edge of the section including the said pro-jections having applied thereto absorbent material for giving rigidity or stiffness to said parts.

JAMES J. MANDERSCHEID. 

